Răspuns :
a |---|+12+15
b |---|+12
c |---|
Total:639
639-39=600
600:3=200(c)
200+12=212(b)
212+15=227(a)
Răspuns:
a+b+c=639
b=a-15=>a=b+15
b=c+12=>c=b-12
b+15+b+b-12=639
3b=639-3
b=636:3=>b=212
a=212+15=227
c=212-12=200
a |---|+12+15
b |---|+12
c |---|
Total:639
639-39=600
600:3=200(c)
200+12=212(b)
212+15=227(a)
Răspuns:
a+b+c=639
b=a-15=>a=b+15
b=c+12=>c=b-12
b+15+b+b-12=639
3b=639-3
b=636:3=>b=212
a=212+15=227
c=212-12=200